My lappy is online 24/7 and I never had this issue.
Well if you said that you tried to reinstall os twice and is back...
But you didnt mentioned was it clear install or only restore....
It seems like refreshing is not working properly...
You didnt said your video card brand.
If its nvidia try to get drivers from laptopvidia2go. Install latest and try, but before uninstall totally old ones...
Second one try updating bios.